.\"
.\" CDDL HEADER START
.\"
.\" The contents of this file are subject to the terms of the
.\" Common Development and Distribution License (the "License").
.\" You may not use this file except in compliance with the License.
.\"
.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
.\" or http://www.opensolaris.org/os/licensing.
.\" See the License for the specific language governing permissions
.\" and limitations under the License.
.\"
.\" When distributing Covered Code, include this CDDL HEADER in each
.\" file and include the License file at usr/src/OPENSOLARIS.LICENSE.
.\" If applicable, add the following below this CDDL HEADER, with the
.\" fields enclosed by brackets "[]" replaced with your own identifying
.\" information: Portions Copyright [yyyy] [name of copyright owner]
.\"
.\" CDDL HEADER END
.\"
.\"
.\" Copyright (c) 2009 Sun Microsystems, Inc. All Rights Reserved.
.\" Copyright 2011 Joshua M. Clulow <josh@sysmgr.org>
.\" Copyright (c) 2011, 2019 by Delphix. All rights reserved.
.\" Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
.\" Copyright (c) 2014, Joyent, Inc. All rights reserved.
.\" Copyright (c) 2014 by Adam Stevko. All rights reserved.
.\" Copyright (c) 2014 Integros [integros.com]
.\" Copyright 2019 Richard Laager. All rights reserved.
.\" Copyright 2018 Nexenta Systems, Inc.
.\" Copyright 2019 Joyent, Inc.
.\"
.Dd June 30, 2019
.Dt ZFS-ALLOW 8
.Os
.Sh NAME
.Nm zfs-allow
.Nd Delegates ZFS administration permission for the file systems to non-privileged users.
.Sh SYNOPSIS
.Nm zfs
.Cm allow
.Op Fl dglu
.Ar user Ns | Ns Ar group Ns Oo , Ns Ar user Ns | Ns Ar group Oc Ns ...
.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns ...
.Ar filesystem Ns | Ns Ar volume
.Nm zfs
.Cm allow
.Op Fl dl
.Fl e Ns | Ns Sy everyone
.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns ...
.Ar filesystem Ns | Ns Ar volume
.Nm zfs
.Cm allow
.Fl c
.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns ...
.Ar filesystem Ns | Ns Ar volume
.Nm zfs
.Cm allow
.Fl s No @ Ns Ar setname
.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns ...
.Ar filesystem Ns | Ns Ar volume
.Nm zfs
.Cm unallow
.Op Fl dglru
.Ar user Ns | Ns Ar group Ns Oo , Ns Ar user Ns | Ns Ar group Oc Ns ...
.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns ... Oc
.Ar filesystem Ns | Ns Ar volume
.Nm zfs
.Cm unallow
.Op Fl dlr
.Fl e Ns | Ns Sy everyone
.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns ... Oc
.Ar filesystem Ns | Ns Ar volume
.Nm zfs
.Cm unallow
.Op Fl r
.Fl c
.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns ... Oc
.Ar filesystem Ns | Ns Ar volume
.Nm zfs
.Cm unallow
.Op Fl r
.Fl s No @ Ns Ar setname
.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns ... Oc
.Ar filesystem Ns | Ns Ar volume
.Sh DESCRIPTION
.Bl -tag -width ""
.It Xo
.Nm zfs
.Cm allow
.Ar filesystem Ns | Ns Ar volume
.Xc
Displays permissions that have been delegated on the specified filesystem or
volume.
See the other forms of
.Nm zfs Cm allow
for more information.
.Pp
Delegations are supported under Linux with the exception of
.Sy mount ,
.Sy unmount ,
.Sy mountpoint ,
.Sy canmount ,
.Sy rename ,
and
.Sy share .
These permissions cannot be delegated because the Linux
.Xr mount 8
command restricts modifications of the global namespace to the root user.
.It Xo
.Nm zfs
.Cm allow
.Op Fl dglu
.Ar user Ns | Ns Ar group Ns Oo , Ns Ar user Ns | Ns Ar group Oc Ns ...
.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns ...
.Ar filesystem Ns | Ns Ar volume
.Xc
.It Xo
.Nm zfs
.Cm allow
.Op Fl dl
.Fl e Ns | Ns Sy everyone
.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns ...
.Ar filesystem Ns | Ns Ar volume
.Xc
Delegates ZFS administration permission for the file systems to non-privileged
users.
.Bl -tag -width "-d"
.It Fl d
Allow only for the descendent file systems.
.It Fl e Ns | Ns Sy everyone
Specifies that the permissions be delegated to everyone.
.It Fl g Ar group Ns Oo , Ns Ar group Oc Ns ...
Explicitly specify that permissions are delegated to the group.
.It Fl l
Allow
.Qq locally
only for the specified file system.
.It Fl u Ar user Ns Oo , Ns Ar user Oc Ns ...
Explicitly specify that permissions are delegated to the user.
.It Ar user Ns | Ns Ar group Ns Oo , Ns Ar user Ns | Ns Ar group Oc Ns ...
Specifies to whom the permissions are delegated.
Multiple entities can be specified as a comma-separated list.
If neither of the
.Fl gu
options are specified, then the argument is interpreted preferentially as the
keyword
.Sy everyone ,
then as a user name, and lastly as a group name.
To specify a user or group named
.Qq everyone ,
use the
.Fl g
or
.Fl u
options.
To specify a group with the same name as a user, use the
.Fl g
options.
.It Xo
.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns ...
.Xc
The permissions to delegate.
Multiple permissions may be specified as a comma-separated list.
Permission names are the same as ZFS subcommand and property names.
See the property list below.
Property set names, which begin with
.Sy @ ,
may be specified.
See the
.Fl s
form below for details.
.El
.Pp
If neither of the
.Fl dl
options are specified, or both are, then the permissions are allowed for the
file system or volume, and all of its descendents.
.Pp
Permissions are generally the ability to use a ZFS subcommand or change a ZFS
property.
The following permissions are available:
.Bd -literal
NAME             TYPE           NOTES
allow            subcommand     Must also have the permission that is
                                being allowed
clone            subcommand     Must also have the 'create' ability and
                                'mount' ability in the origin file system
create           subcommand     Must also have the 'mount' ability.
                                Must also have the 'refreservation' ability to
                                create a non-sparse volume.
destroy          subcommand     Must also have the 'mount' ability
diff             subcommand     Allows lookup of paths within a dataset
                                given an object number, and the ability
                                to create snapshots necessary to
                                'zfs diff'.
load-key         subcommand     Allows loading and unloading of encryption key
                                (see 'zfs load-key' and 'zfs unload-key').
change-key       subcommand     Allows changing an encryption key via
                                'zfs change-key'.
mount            subcommand     Allows mount/umount of ZFS datasets
promote          subcommand     Must also have the 'mount' and 'promote'
                                ability in the origin file system
receive          subcommand     Must also have the 'mount' and 'create'
                                ability
rename           subcommand     Must also have the 'mount' and 'create'
                                ability in the new parent
rollback         subcommand     Must also have the 'mount' ability
send             subcommand
share            subcommand     Allows sharing file systems over NFS
                                or SMB protocols
snapshot         subcommand     Must also have the 'mount' ability

groupquota       other          Allows accessing any groupquota@...
                                property
groupused        other          Allows reading any groupused@... property
userprop         other          Allows changing any user property
userquota        other          Allows accessing any userquota@...
                                property
userused         other          Allows reading any userused@... property
projectobjquota  other          Allows accessing any projectobjquota@...
                                property
projectquota     other          Allows accessing any projectquota@... property
projectobjused   other          Allows reading any projectobjused@... property
projectused      other          Allows reading any projectused@... property

aclinherit       property
acltype          property
atime            property
canmount         property
casesensitivity  property
checksum         property
compression      property
copies           property
devices          property
exec             property
filesystem_limit property
mountpoint       property
nbmand           property
normalization    property
primarycache     property
quota            property
readonly         property
recordsize       property
refquota         property
refreservation   property
reservation      property
secondarycache   property
setuid           property
sharenfs         property
sharesmb         property
snapdir          property
snapshot_limit   property
utf8only         property
version          property
volblocksize     property
volsize          property
vscan            property
xattr            property
zoned            property
.Ed
.It Xo
.Nm zfs
.Cm allow
.Fl c
.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns ...
.Ar filesystem Ns | Ns Ar volume
.Xc
Sets
.Qq create time
permissions.
These permissions are granted
.Pq locally
to the creator of any newly-created descendent file system.
.It Xo
.Nm zfs
.Cm allow
.Fl s No @ Ns Ar setname
.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns ...
.Ar filesystem Ns | Ns Ar volume
.Xc
Defines or adds permissions to a permission set.
The set can be used by other
.Nm zfs Cm allow
commands for the specified file system and its descendents.
Sets are evaluated dynamically, so changes to a set are immediately reflected.
Permission sets follow the same naming restrictions as ZFS file systems, but the
name must begin with
.Sy @ ,
and can be no more than 64 characters long.
.It Xo
.Nm zfs
.Cm unallow
.Op Fl dglru
.Ar user Ns | Ns Ar group Ns Oo , Ns Ar user Ns | Ns Ar group Oc Ns ...
.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns ... Oc
.Ar filesystem Ns | Ns Ar volume
.Xc
.It Xo
.Nm zfs
.Cm unallow
.Op Fl dlr
.Fl e Ns | Ns Sy everyone
.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns ... Oc
.Ar filesystem Ns | Ns Ar volume
.Xc
.It Xo
.Nm zfs
.Cm unallow
.Op Fl r
.Fl c
.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns ... Oc
.Ar filesystem Ns | Ns Ar volume
.Xc
Removes permissions that were granted with the
.Nm zfs Cm allow
command.
No permissions are explicitly denied, so other permissions granted are still in
effect.
For example, if the permission is granted by an ancestor.
If no permissions are specified, then all permissions for the specified
.Ar user ,
.Ar group ,
or
.Sy everyone
are removed.
Specifying
.Sy everyone
.Po or using the
.Fl e
option
.Pc
only removes the permissions that were granted to everyone, not all permissions
for every user and group.
See the
.Nm zfs Cm allow
command for a description of the
.Fl ldugec
options.
.Bl -tag -width "-r"
.It Fl r
Recursively remove the permissions from this file system and all descendents.
.El
.It Xo
.Nm zfs
.Cm unallow
.Op Fl r
.Fl s No @ Ns Ar setname
.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns ... Oc
.Ar filesystem Ns | Ns Ar volume
.Xc
Removes permissions from a permission set.
If no permissions are specified, then all permissions are removed, thus removing
the set entirely.
.El
